Nut lock



P. A. FLYNN NUT LOCK pril 8, 1924. 1,489,826

Filed July 15 1922 Patented Apr. 8, 1924.

UM TATES tisane PATRIQK A. FLYNN, 0F PORTLAND, OREGON.

NUT LOCK.

Application filed July 15,

To all 'whomz't may concern:

Be it hereby known that I, PATRICK A. FLYNN, a citizen of the United States, and a resident of Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Nut Lock, of which the following is a specification.

This invention relates more particularly to means for locking nuts and bolts against turning.

rI`he objects of my invention are to provide an exceedingly simple and eiiicient nut lock which will be low in cost and eicient in operation. Y

A further object is to so construct same that the unlocking operation can be easily accomplished without injury to the nut or threads on the bolt.

I attain these results in the manner set forth in the following specication and illustrated in the accompanying drawing, in

p which Figure l is a front elevation of a nut equipped with my lock. Figure 2is a side elevation of Figure l and Figure 3 a plan of same. Figure 4 is an enlarged elevation of the locking pin of which Fig. 5 is a plan. Figure 6 is an elevation o'l' a second form or" my device. Figure 7 is an elevation ot a third form of my device of which Figure 8 is a plan. Figure 9 is an elevation of a fourth form ot the device or" which Figure y 10 is a plan.

Similar numbers of reference refer to the same or similar parts throughout the several views.

Referring in detail to the drawing, I have constructed my device in the form oi' a lock tor the nut l1 whose sides l2 have t-he slot 13 formed therein. Into the hole la is driven a pointed pin l5 one side oi' whose upper end 16 is cut away and having the slot 17 formed therein. The portion 18 is bent outwardly to form a spring latch whose end 19 will engage the under side 20 oi' the slot 13 when the `point 2l is driven into the metal 22 against which the nut 11 bears.

In Fig. 6 I have shown a pin 15A similar to pin l5 except that the slot 17 is `omitted and the end 16 is curved outwardly. A notch 23 may be provided in the side of the 1922. Serial N0. 575,188.

pin 15A to assist in releasing the pin when it is desired to turn the nut or bolt.

In Figure 7 I have illustrated a pin 15B from whose middle the split portion 24 projects.

In Figure 9 I have illustrated the pin 15C whose entire length is curved and its convex side 25 is cut away along the line 26 to form a spring for holding the shoulder 27 under the edge 20. It will be understood that suiiicient play must be provided between the hole 14 and the pin 15C to permit easy movement. A head 28 is provided for the pin 15C to assist in withdrawing the pin instead of using the notch 23, as previously suggested.

It will be understood that the same loclr can be used at the head end of a bolt where it is desired to keep the bolt from turning.

Attention is drawn to my United States Patent No. 1,363,50a December 28, 1920 for a lock nut, over which this invention is an improvement.

I am aware that many forms of nut locks have been invented in the past, I therefore intend to cover only such Jforms and modifications of this device as tall fairly within the appended claims.

I/Vhat I claim as new is:

l. A nut lock consisting of a nut having a slot cut in its side across one. of its corners and having a hole parallel to its tapped opening passing through said slot, in combination with a pointed spring pin adapted to be driven through said hole, said pin having a shoulder formed thereon adapted to be sprung under the upper edge of said slot when the point ot said pin projects from said nut.

2. A nut lool; consisting oi a nut having a hole drilled through one corner parallel to its axis and having a slot cut into said hole from the side, in combination with a pointed pin having a spring latch :formed thereon by splitting said pin and shortening one ot its sides and bending same outwardly in a manner that said shortened side can lock under the upper side of said slot, and having a notch cut in the shortened side of said pin to facilitate its removal.

PATRICK A. FLYNN. 

